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G.F.BURTON. ADJUSTABLE ROLLER FRAME FOR EDGERS.

Patented Aug. 28, 1883,

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UNITED STATES PATENT OFFICE,

GEORGE F. BURTON, OF EAU CLAIRE, WVISCONSIN.

ADJUSTABLE ROLLER- FRAME FOR EDGERS.

SPECIFICATION forming part of Letters Patent No. 283,752, dated August 28, 1883.

Application filed June 4, 1883. (N0 modehi ToaZZ whom it may concern Be it known that I, GEORGE F. BURTON, a

citizen of the United States, residing at Eau Claire, in the county of Eau Claire and State of WVisconsin, have invented a new and useful Improvement in Saw-Gang Edgers, of which the following is a full, clear, and exact description. My invention relates to an improved construction of the adjustable roller-bed upon which planks or boards to be sawed into narrower stuff are supported while being drawn along in contact with the gang of saws by fluted or other feed-rollers, and thesame will be fully understood from the following description and claims, in connection with the accompanying drawings, in which latter Figure 1 is a side elevation of the improved adjustable roller-bed; Fig. 2, a plan view of the same, and Fig. 3 an end view of one of the and its side rails, and a portion of the supporting-frame upon which it is applied.

The drawings represent the novel means which I employ for making a roller-bed which is adjustable, as follows: The rollers are set and held either parallel with the arbor of the gang of saws or oblique thereto in two di rections which are reverse of each other, the direction of their obliquity being such, accordingly as circumstances may require, that the straight edge of the plank or board being sawed'will be made to bear against a guide consisting of pins 0 0, or other suitable means either on the right-hand or the left-hand side of the roller-bed.

In the drawings, A represents a suitable guides allow the rail a. to slide upon the frame A.

On the sides of the rail a gage stop-plates o 0 are fastened, one forward of and the other in rear of the guides 11. These stops are slotted and confined in position by clamp-bolts (1, so as to be set farther from or nearer to the guide-pins 0. By means of these stops and the guides, the extent of sliding movement of the rail (1/ can be regulated or limited. The rollers B of the bed are provided with short journals 6, which are fitted loosely in curved half-notch bearings f, formed in the movable rail a and the stationary rail (0.

The notches should be of a little greater width than the diameter of the journals, so as to allow the journals and rollers to be set slightly oblique in the direction indicated by the dotted lines 00, or in an oblique direction (see dotted line y) directly the reverse of that indicated by the dotted lines :0.

For adjusting the roller-bed to either of the oblique positions described, and for holding them parallel to the arbor-s of the saw-gangs C, an elbow-lever, D, is provided, said'lever being fastened to the frame A by a pivot, g,

The notches of the sector-plate may corre' spond with gage-lines marked on the frame A, as at n, so that when either of the stop-plates is adjusted to one of said lines the movement of the rail a of the roller-bed will be such as to insure the springing of the latch F into one of the notches of the sector-plate.

The lever is operated by first pressing the fingers against the spring-latch F, so as to with draw it from a notch of the sector-plate, and then by moving it up or downward. A downward movement of the lever beyond the horizontal line shown in Fig. 1 will cause the rail a to slide in the direction of the arrow 1, and

' an upward movement will cause it to slide in avoided.

the direction of the arrow 2. These move ments are caused by one or the other of the prongs h of the short arm of the elbow-lever D drawing up on the pin m. The sliding movements of the rail cause the rollers B to stand obliquely either in the direction indicated by the dotted lines as or in a direction just the reverse of the same, indicated by dotted lines y. When the rollers B stand in the oblique direction indicated by the dotted lines on, the

straight edge of the plank will bear against the guide-pins 0 of stationary guide-rail a, and when their oblique direction is reversed, as indicated by lines 3 it will bear against the guide-pins 0 of movable guide-rail c. There is great advantage in having the rollers 13 adjustable in oblique directions for this reason, viz: WVhen boards or planks that have one straight edge are to be split into narrower strips, the straight edge is always placed against the guide, and by swinging the rollers as described it is forced against the guides all the way. This prevents the possibility of the board drawing away from the guides and spoiling the outside strip by being too narrow at one end, as is often the casewith the ordinary edger. Thus a great waste of lumber is My mechanism for adjusting the roller-bed, in connection-with a sliding rail, a, is novel and useful, if the rollers are made adjustable in but one oblique direction, and I desire to be protected in the same whether the-lever makes a vibratory movement from a horizontal position upward and downward or from a horizontal position downward and upward, or a vibrating movement extending below or above a horizontal position.

The feed-rollers It, sawgang O, pulleys r r r, and belts may be of usual construction and arrangement, as shown, and therefore need not be specially described.

If desired, the vertical guide-pins o 0 might be substituted by continuous bearing-strips attached to top of rails a a; or horizontal pins might be set in such strips.

provided with a sliding bearing-rail having suitable guides, 0, whereby the roller-bed is made adjustable from a parallel to an oblique position with respect to the arbor of the saws, substantially as and for the purpose described.

2. The combination, with ordinary slittingsaws, feeding mechanism, and a supportingframe having a stationary guiding and bearing rail, of a roller-bed provided with a sliding bearingrail having suitable guides, 0, whereby the roller-bed is made adjustable from a position which is parallel with the sawarbor to positions which are oblique to said arbor and the reverse of each other, substan tially as and for the purpose described.

3. The combination, with a supporting frame, A, provided with a bearing-rail, a, having guides 0, of a roller-bed provided with a bearing-rail, a, having guides 0, and made adjustable for the purpose of giving an oblique position or a parallel set to the rollers 13 with respect to the saw-arbor, substantially as described.

GEORGE r. BURTON.

. Witnesses J. F. ELLIs, O. D. SPALDING. 

